Articles by Verena

Exploring lime on the house prices dataset

January 24, 2018 | Verena

Pretty recently I found a paper with the title “Why Should I Trust You?”: Explaining the Predictions of Any Classifier. The topic of interpretability is very important in the times of complex machine learning models and it’s also related to my PhD topic (reliability of machine learning models). Therefore ... [Read more...]

Learning Club 16: Genetic Algorithms

July 8, 2017 | Verena

Some time ago I published a blog post with the title Know your data structures!. In this previous post I explained how I improved the running time of a genetic algorithm. I promised to go more into detail about other noteworthy things in the code in a separate article since ... [Read more...]

Know your data structures!

May 7, 2017 | Verena

Just a few days ago I stated the following on Twitter: Just reduced the runtime of an algorithm from 9 hours to 3 min. by using a different data structure… Know you data structures ? #rstats — Verena Haunschmid (@ExpectAPatronum) May 1, 2017 Since my tweet has been liked and shared a lot, I thought … Continue ...

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Presentation “R for Data Science”

March 18, 2017 | Verena

Some weeks ago I had a presentation at my work place about “R for data science” that I’d like to share with you. I’ve written the slides in R and rmarkdown and uploaded them to rpubs.com. I chose to use rmarkdown for my slides although we have ...

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Accessing MSSQL Server with R (RSQLServer with dplyr)

February 18, 2017 | Verena

Recently I have been starting to use dplyr for handling my data in R. It makes everything a lot smoother! My previous workflow – running an SQL query, storing the results as CSV, loading it in RStudio – is now history. With dplyr you can directly query data from many different databases ...

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Accessing your Fitbit data

September 18, 2016 | Verena

Since I am a data junkie and bought my Fitbit Charge HR mainly because I wanted to collect and analyse data about myself, I was looking for ways to download the data to your computer. For most people the great stats overview in the app and in the online dashboard ... [Read more...]

Learning Club 05-07: Starting to love rmarkdown (Naive Bayes, Clustering, Linear Regression)

July 27, 2016 | Verena

I remember when I had an R course at university I was really not a fan of rmarkdown and knitr. But since I participate in a Learning Club, where people are encouraged to document and present their code, data and results, I started to love it. Prior to that I’... [Read more...]

Adding basemap.at tiles to an R leaflet plot

January 28, 2016 | Verena

Recently I wanted to visualise some data in a map of Austria. R Leaflet provides a pretty good looking map by default (openstreetmap.org) but I wanted to use basemap.at, which is a map for Austria and therefore probably the most accurate map available for Austria. Actually it is ...

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Use R to connect to twitter and create a wordcloud of your tweets

January 18, 2016 | Verena

Recently I wanted to create a wordcloud of my tweets and do further analysis. In this post I am going to show you how to connect to twitter in R and how to make a wordcloud from your tweets. To follow this tutorial, you need a Twitter account. First steps ...

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Use rvest to scrape NFL weather data

January 7, 2016 | Verena

If you are following my progress in the Data Science Learning Club you might know that I am using NFL data for the tasks. For predicting sports events I think it is not only important to have statistics about the players, teams and previous games but also about the weather. ...